<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/guanli.png" alt="" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主题区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单区域 -->
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409BFF"
          unique-opened
          :collapse="isCollapse"
          :collapse-transition="false"
          router
          :default-active="activePath"
        >
          <!-- 一级菜单 -->
          <el-submenu
            :index="items.id + ''"
            v-for="items in menulist"
            :key="items.id"
          >
            <!-- 一级菜单的模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconsObj[items.id]"></i>
              <!-- 文本 -->
              <span>{{ items.authName }}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item
              :index="'/' + subItem.path"
              v-for="subItem in items.children"
              :key="subItem.id"
              @click="saveNavState('/' + subItem.path)"
            >
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{ subItem.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容主体 -->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      // 左侧菜单数据
      menulist: [
        {
          id: 0,
          authName: '用户管理',
          children: [
            {
              id: 0,
              authName: '用户列表',
              path: 'user'
            }
          ]
        },
        {
          id: 1,
          authName: '权限管理',
          children: [
            {
              id: 10,
              authName: '角色列表',
              path: 'role'
            },
            {
              id: 11,
              authName: '权限列表',
              path: 'right'
            }
          ]
        },
        {
          id: 2,
          authName: '商品管理',
          children: [
            {
              id: 20,
              authName: '商品列表',
              path: 'list'
            },
            {
              id: 21,
              authName: '分类参数',
              path: 'canshu'
            },
            {
              id: 22,
              authName: '商品分类',
              path: 'varies'
            }
          ]
        },
        {
          id: 3,
          authName: '订单管理',
          children: [
            {
              id: 30,
              authName: '商品列表'
            },
            {
              id: 31,
              authName: '分类参数'
            },
            {
              id: 32,
              authName: '商品分类'
            }
          ]
        },
        {
          id: 4,
          authName: '数据统计',
          children: [
            {
              id: 40,
              authName: '商品列表'
            },
            {
              id: 41,
              authName: '分类参数'
            },
            {
              id: 42,
              authName: '商品分类'
            }
          ]
        }
      ],
      iconsObj: {
        0: 'iconfont icon-users',
        1: 'iconfont icon-quanxian',
        2: 'iconfont icon--shangpinguanli',
        3: 'iconfont icon-dingdanguanli',
        4: 'iconfont icon-shuju'
      },
      isCollapse: false,
      // 被激活的链接地址
      activePath: ''
    }
  },
  // created() {
  //   this.getMenuList()
  //   this.activePath = window.sessionStorage.getItem('activePath')
  // },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取所有的菜单
    // async getMenuList() {
    //   const { data: res } = await this.$http.get('menus')
    //   if (res.mata.status !== 200) return this.$message.console.error(res.meta.msg)
    //   this.menulist = res.data
    //   console.log(res)
    // }
    // 点击按钮，切换菜单的折叠与展开
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    // 保存链接的激活状态
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
.home-container {
  height: 100%;
}

.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}

.el-aside {
  background-color: #333744;
  .el-menu {
    border-right: 0;
  }
}

.el-main {
  background-color: #eaedf1;
}

.iconfont {
  margin-right: 10px;
}

.toggle-button {
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
